Henrik Bengtsson,Ronan Carroll,Soeren Steenfeldt-Jensen,Henning Graaskov,Jan Harald Preuthun,Emil Gram Spork
申请号：
US15735943
公开号：
US10512730B2
申请日:
2016.07.01
申请国别(地区):
US
年份:
2019
代理人:
摘要：
The present invention relates to a piston washer (109, 209) for use in a drug delivery device for transferring a distally directed axial force from a piston rod (107, 207) towards a piston (199, 299) of a held cartridge (189, 289). The piston washer (109, 209) defines a proximal surface portion (109a) adapted for engagement with the distal portion of a piston rod (107, 207) and a distal surface portion (109b) configured to engage and abut a piston (199, 299). An axial distance defining device (19a1, 109b1, 109c, 209c) is positioned between the proximal surface portion (109a) and the distal surface portion (109b), wherein the axial distance defining device (19a1, 109b1, 109c, 209c) is configured to be shifted from a first axial compressible state into a second axial non-compressible state. The invention further relates to a drug delivery device incorporating such piston washer (109, 209).
